Chapter Three: The Enslaver Plague.
The Enslavers, also known as Psyrens, Krell, dominators or puppeteers in different parts of the galaxy, are a race of other-dimensional psychic alien jellyfish from the Immaterium. Enslavers will mind control any unprotected psychic being that they can in order to turn them into living warp portals that more Enslavers can enter the material universe through. This control appears to be psionic in nature. The Enslaver Plague forced the C'tan Star-Gods to withdraw into hibernation, as the Enslavers were killing off all the sentient life that the Star Gods needed for sustenance. It also lead to the downfall of the Old Ones, as the Enslavers infested their last strongholds and destroyed their guardians.
The Enslavers, also known as Psyrens, Krell, dominators or puppeteers in different parts of the galaxy, are a race of other-dimensional psychic alien jellyfish from the Immaterium. Enslavers will mind control any unprotected psychic being that they can in order to turn them into living warp portals that more Enslavers can enter the material universe through. This control appears to be psionic in nature. The Enslaver Plague forced the C'tan Star-Gods to withdraw into hibernation, as the Enslavers were killing off all the sentient life that the Star Gods needed for sustenance. It also lead to the downfall of the Old Ones, as the Enslavers infested their last strongholds and destroyed their guardians.
Enslavers are slightly larger than a grown man, however other size ranges are possible as the former has been the average assessment. These xenos have sac-like bodies which contract with movement and are almost completely transparent, the front is recognizable by numerous tentacles originating from the anterior end and down to the posterior along the bottom. The face of the Enslaver is an almost mask like visage with numerous eye-holes of differing sizes. An Enslaver also possesses the abilty to phase in and out of the Materium as it manifests from a psyker. The creatures possess psykers as daemons would, yet do not show any outward signs of possession, instead working clandestinely to further it's own ends -- ultimately the possession of other psykers to allow the passage of more Enslavers. Unlike daemons, Enslavers can control non-psykers, which they consume the minds of, furthering their own power and allowing the control of more potential slaves. Eventually, with enough Enslavers or one of extraordinary power it may be able to control an entire Hive of humans and then spread across the planet, after which the only acceptable plan of action is Exterminatus.
Upon the death of a possessed psyker, the body is destroyed and the Enslaver emerges, the psyker having served its purpose. Despite the virus-like actions and considerable threat the species represents to the Imperium the Enslavers cannot possess sanctioned psykers as easily due to the preparation their minds have undergone and can be overwhelmed if enough minds are present. Unfortunately the protection sanctionites have is temporary and with enough pressure upon their mind, they will break and be obliterated by the Enslaver. Yet even so, the resistance would be adequate for the psyker and others around them to mount a physical attack.
The Ordo Malleus and Ordo Xenos have a dual interest in Enslavers for their warp origins and their existence as an alien species; Numerous Enslavers were encountered by Inquisition forces in the Scintilla System in 260.993.M41 and subsequently destroyed.